Soot Mass Flow Measurement System Using Triboelectricity and Ultrasonic

A new method, triboelectricity and ultrasonic, for the soot mass flow measurement is developed. The direct rod-shaped sensor is used to measuring the triboelectricity charge and the ring sensor is used to measuring the electrostatic induction charge. The pure-triboelectricity can be figured out and the pure-triboelectricity is eliminated the influence of the electrostatic induction. Through the numerical simulation, the proportion between the electrostatic induction charge and the electrostatic induction charge is presented. The gas flowrate is measured by the ultrasonic. The soot mass flow can be figured out through the pure-triboelectricity and the gas velocity. Additionally, the sample calibration equipment based on the pure-triboelectricity and ultrasonic method is also introduced. Experimental results show the method can on-line measure the soot mass flow.

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Study on Velocity Measurement of Gas/Solid Flow Based on Electrostatic Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.614.275 ◽

2014 ◽

Vol 614 ◽

pp. 275-278

Author(s):

Yu Tang ◽

Xiang Deng ◽

Shuo Tian

Keyword(s):

Measurement System ◽

Velocity Measurement ◽

Flow Measurement ◽

Cross Correlation ◽

Low Cost ◽

High Sensitivity ◽

Two Phase ◽

Solid Flow ◽

Correlation Algorithm ◽

Electrostatic Induction

Electrostatic sensor is based on the principle of electrostatic induction. It is widely used for gas/solid two-phase flow measurement because it has the advantages of simple structure, high sensitivity, low cost, etc. In this paper, a velocity measurement system of gas/solid flow based on electrostatic sensor and cross-correlation algorithm is discussed. Electrostatic sensor with circular electrode is adopted. By COMSOL optimum simulation, the axial length of the electrode is designed. The signal conditioning circuits are discussed and cross-correlation algorithm is analyzed. The initial experimental results demonstrate that the velocity measurement system of gas/solid flow designed in this paper is feasible.

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On-line measurement of the mass flow rate in hot circulating fluidized beds using electrostatic induction charges

Proceedings of 1994 IEEE Industry Applications Society Annual Meeting ◽

10.1109/ias.1994.377653 ◽

2002 ◽

Cited By ~ 1

Author(s):

K. Dybeck ◽

R. Nagel ◽

H. Schoenfelder ◽

H. Singer

Keyword(s):

Mass Flow Rate ◽

Mass Flow ◽

Flow Rate ◽

Fluidized Beds ◽

Circulating Fluidized Beds ◽

Electrostatic Induction ◽

Line Measurement ◽

On Line

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Accurate Field Compressor Inlet Flow Measurement System

Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy ◽

10.1115/gt2019-91955 ◽

2019 ◽

Author(s):

Joshua McConkey ◽

Richard H. Bunce ◽

Heiko Claussen

Keyword(s):

Pressure Drop ◽

Gas Turbine ◽

Mass Flow ◽

Measurement System ◽

Flow Measurement ◽

Engine Performance ◽

Flow Meters ◽

Air Mass ◽

Safety Margins ◽

Compressor Inlet

Abstract Understanding the amount of air that enters a gas turbine is important for calculating their performance and efficiency. Flow meters are almost never used to measure that flow in production engines. Typical flow meters are impractical because the air flow into the compressor is very large, up to 1400 lbs/s (635 kg/s) or 1,000,000 ft3/min (28,300 m3/min), and typically an intentional pressure drop is involved in the measurement. This pressure drop negatively impacts the performance of the engine. If inlet air mass flow were known accurately without negatively impacting the engine performance, then engines could be run more efficiently. Currently, inlet mass flow is typically inferred, rather than measured. This leads to increased safety margins which require engines to be run more conservatively, i.e., at lower power. This paper describes a novel, inexpensive, and accurate air mass flow measurement system with negligible impact on engine performance.

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Software for on-line mass flow measurement of particles in pneumatic suspension

10.1049/ic:19960871 ◽

1996 ◽

Author(s):

Y. Yan

Keyword(s):

Mass Flow ◽

Flow Measurement ◽

Line Mass ◽

Pneumatic Suspension ◽

On Line

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DESIGN AND IMPLEMENTATION OF AN INSTANTANEOUS FUEL MASS FLOW MEASUREMENT SYSTEM FOR USE IN VERIFICATION OF LOCOMOTIVE EMISSIONS

10.33915/etd.3781 ◽

2019 ◽

Author(s):

Adam Wayne James

Keyword(s):

Mass Flow ◽

Measurement System ◽

Flow Measurement ◽

Fuel Mass ◽

Design And Implementation

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Total Volume and Component Flow Measurement in Industrial Slurries and Suspensions Using Correlation Techniques

Measurement and Control ◽

10.1177/002029407100400802 ◽

1971 ◽

Vol 4 (8) ◽

pp. T133-T138 ◽

Cited By ~ 11

Author(s):

M. S. Beck ◽

G. Calvert ◽

J. H. Hobson ◽

K. T. Lee ◽

P. J. Mendies

Keyword(s):

Electrical Conductivity ◽

Time Delay ◽

Transit Time ◽

Mass Flow ◽

Flow Measurement ◽

Low Cost ◽

Ultrasonic Transducers ◽

On Line ◽

Correlation Techniques ◽

Capacitance Transducers

Flow velocity can be derived directly from the transit time of natural turbulence signals between two transducers spaced along the direction of flow. The transit time is determined by cross-correlating the transducer outputs with either a special purpose correlator or an on-line computer. Advantages are that the time delay can be measured absolutely by the correlator, the flowmeters are relatively insensitive to the effects of up-stream disturbances, the transducers do not obstruct the flow, and suspensions and slurries can be metered. Results are presented for flow measurement of sand/water slurries using electrical conductivity and ultrasonic transducers, and for heavily loaded gaseous suspensions using capacitance transducers. A low cost mass flowmeter has been devised in which the mass flow of solids in a pneumatic conveyor is derived from measurement of variations in concentration intensity due to turbulence. Results are given for mass flow measurement of foodstuffs (flour, wheat and beans), pulverised fuel, cement and chemicals.

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Granular Fertilizer Mass Flow Measurement and Vehicle Experiments Based on Microwave Doppler Method

Applied Engineering in Agriculture ◽

10.13031/aea.14013 ◽

2021 ◽

Vol 37 (1) ◽

pp. 135-147

Author(s):

Jiayun Huang ◽

Liwei Yang ◽

Jiqin Zhang ◽

Hao Hu

Keyword(s):

Mass Flow ◽

Measurement System ◽

Flow Measurement ◽

Measurement Accuracy ◽

Interference Suppression ◽

Power Spectra ◽

List Type ◽

Flow Measurements ◽

Vibration Signals ◽

Doppler Method

HighlightsA microwave Doppler-based fertilizer mass flow measurement system was developed.The measurement system was applied in vehicle experiments.Power spectra of mass flow signal and vibration signal were obtained and analyzed.Interference suppression algorithm based on CA-CFAR reduced vibration interference.Fertilizer mass flow measurement accuracy was improved by interference suppression.Abstract. The fertilizer mass flow measurement system is typically installed on the fertilizer applicator. However, vehicle vibrations are inevitable during field operation of fertilizing equipment, and can interfere with mass flow signals, thereby affecting the accuracy of mass flow measurements. In this article, a mass flow measurement system based on the microwave Doppler method was introduced. The dominant frequency (fdot) related to fertilizer velocity and the power spectral density (PSD) related to fertilizer concentration were obtained from the Doppler signal of the granular fertilizer processed using fast Fourier transform. The product of fdot and PSD is defined as the sensor output value (SOV). The relationship between SOV, PSD, and fertilizer mass flow (FMF) was studied under vehicle conditions. The linear regression models of 22-8-10 (MOP) high-nitrogen poly-?-glutamic acid fertilizer were established using the least squares method, and the vibration signals were measured. Based on analysis of the power spectra of the mass flow and vibration signals, an interference suppression algorithm based on cell average constant false alarm rate (CA-CFAR) was presented to reduce vibration interference. To verify the performance of the novel vibration interference reduction algorithm, vehicle experiments were conducted at different tractor velocities. The results show that mass flow measurements ranged from 1300 to 3000 g min-1. It was found that using only the PSD related to concentration for flow measurement gave better measurement accuracy compared with SOV, and relative errors of the system were within 8.1%. Correlation between the PSD and FMF improved with interference suppression algorithm based on CA-CFAR. The determination coefficient increased from 0.01 to 0.92, 0.97 to 0.99, and 0.96 to 0.98 at three different tractor velocities, respectively. From the results, it was evident that the algorithm effectively eliminated vibration interference signals in vehicle conditions. In future work, the conditions of the soil will be considered and the performance of the mass flow measurement system will be tested in the field. Keywords: Fertilizer mass flow, Microwave Doppler radar, Tractor vibration, Vehicle experiment, Vibration interference suppression.

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